Hosta plant named `School Mouse&#39;

ABSTRACT

A new and distinct  Hosta  plant named ‘School Mouse’ with coarsely-sinuate cordate leaf blades having variegation of creamy yellow margins and dark green center and feathering intermediate colors. The plant habit is short, compact and rounded with flowering just above foliage, and the leaves and scapes are thick substance and stiff, flowering just above the foliage with medium lavender flowers with strongly veined deep lavender and white insides.

Botanical classification: Hosta hybrid (Tratt.).

Variety denomination: ‘School Mouse’.

BACKGROUND AND ORIGIN OF THE PLANT

The present invention relates to a new and distinct Hosta plant, Hosta‘School Mouse’ hereinafter also referred to as the new plant or just thecultivar name, ‘School Mouse’. Hosta ‘School Mouse’ was discovered bythe inventor as a non-induced, naturally-occurring, whole-plant mutationin a batch of tissue cultured Hosta ‘Church Mouse’ (not patented) at anursery greenhouse in Zeeland, Mich., USA during the summer of 2012. Thenew plant has been asexually propagated by division at the same nurseryin Zeeland, Mich. USA since 2014 and also by careful shoot tip planttissue culture with the resultant asexually propagated plants havingretained all the same traits as the original plant. ‘School Mouse’ isstable and reproduces true to type in successive generations of asexualreproduction.

Hosta ‘School Mouse’ has not been made publically available or soldanywhere in the world prior to the filing of this application except fordisclosures by the inventor, or one who obtained the material eitherdirectly or indirectly from the inventor, and any such disclosure hasnot been made more than one year prior to the application of thisinvention.

There are over 5,600 registered Hostas with The American Hosta Society,which is the International Cultivar Registration Authority for the genusHosta. Hosta ‘School Mouse’ is a sport from ‘Church Mouse’ (notpatented) which is one of many sports with similar habit all from Hosta‘Blue Mouse Ears’ (not patented). The most similar hosta cultivars knownto the applicant are Hosta ‘Church Mouse’ and ‘Mini Skirt’ U.S. PlantPat. No. 26,743. ‘Church Mouse’ has a similar leaf undulation butdiffers in that the new plant has a margin with a lighter yellowcoloring rather than the margin of ‘Church Mouse with a margin thatdiffers only slightly from the blue-green center with green leaf margin.Hosta ‘Mini Skirt’ has a creamy yellow to creamy white margin, but hasless pronounced leaf undulations. Another cultivar, ‘Ruffled Mouse Ears’(not patented), has similar sport history, both originally arising from‘Blue Mouse Ears’. ‘Ruffled Mouse Ears’ has a similar coarse wave to theleaves but is not variegated. Hosta ‘Mighty Mouse’ (not patented) is asport of ‘Blue Mouse Ears’ with foliage having a creamy yellow to creamywhite margin and green center but also has a flatter leaf.

Other Hosta cultivars have short habit and variegation of a similarnature, or other individual traits similar to ‘School Mouse’ but the newplant differs from the above cultivars and all other Hostas known to theapplicant, by the combination of the following traits.

-   -   1. Cordate, coarsely sinuate leaves.    -   2. Leaves with creamy yellow margins and dark green center and        feathering intermediate colors.    -   3. Stiff scapes and leaves with thick substance.    -   4. Short, compact, rounded habit with dense flowering just above        foliage.    -   5. Flowers of medium lavender and inside strongly veined with        deep lavender and white.

BRIEF DESCRIPTION OF THE DRAWING

The photograph of the new plant demonstrates the overall appearance ofthe plant, including the unique traits. The colors are as accurate asreasonably possible with color reproductions. Ambient light spectrum,temperature, source and direction may cause the appearance of minorvariation in color.

The drawings shows a two-year-old plant in a container in mid-seasongrown in a shaded greenhouse at a nursery in Zeeland, Mich. withsupplement fertilizer and water as needed.

FIG. 1 shows the foliage and habit of the plant.

DETAILED BOTANICAL DESCRIPTION

The following descriptions and color references are based on the 2001edition of The Royal Horticultural Society Colour Chart except wherecommon dictionary terms are used. The new plant, Hosta ‘School Mouse’,has not been observed under all possible environments. The phenotype mayvary slightly with different environmental conditions, such astemperature, light, fertility, moisture and maturity levels, but withoutany change in the genotype. The following observations and sizedescriptions are of a potted two-year-old plant in a shaded greenhousein Zeeland, Mich. with supplemental water and fertilizer.

-   Botanical classification: Hosta hybrid;-   Parentage: whole-plant mutation of Hosta ‘Church Mouse’ (not    patented);-   Propagation: garden division and sterile plant tissue culture;-   Time to initiate roots from tissue culture: about two to three    weeks;-   Growth rate: moderate;-   Crop time: about 12 weeks to finish during the summer in a one-liter    container from rooted tissue culture plantlet;-   Rooting habit: fleshy, lightly branching;-   Plant shape and habit: hardy herbaceous perennial with basal rosette    of leaves emerging from rhizomes producing a short symmetrical mound    of broadly-horizontal sinuate leaves;-   Plant size: foliage height 9.0 to 12.0 cm above soil line to the top    of the leaves and about 24.0 to 28.0 cm wide at the widest point    just above soil line;-   Foliage description: entire, glabrous, slightly glaucous above and    more glaucous below, cordate, broadly acute leaf apex with cordate    base; coarsely sinuate to slightly tortuous;-   Leaf blade: to about 6.7 cm long and about 6.0 cm wide; average    about 5.4 cm long and 5.3 cm wide; dark green center and light    yellow margin that varies between leaves and locations on leaves    from 6.0 mm to 18.0 mm wide; surface smooth without dimpling,    bulging or blistering;-   Leaf blade color: early season still expanding adaxial center color    nearest RHS 137A; early season adaxial margin nearest RHS 144A;    early season abaxial center nearest RHS 144A; early season abaxial    margin between RHS N138B and RHS N138C;-   mid-season and later summer adaxial center nearest RHS 143A;    mid-season and later adaxial margins nearest RHS N144A; mid-season    and later abaxial center nearest RHS 144B; mid-season and later    abaxial margins nearest RHS N144A to RHS 151D depending on light    exposure; small irregular segments of intermediate colors where    adaxial margin and center unevenly and irregularly fold over each    other comprising nearest RHS 143B, nearest RHS 144B and nearest RHS    151A; irregular intermediate abaxial comprising colors of nearest    RHS 143B, nearest RHS 144C and nearest RHS 151C;-   Petiole: entire; glabrous both surfaces; concavo-convex; mostly    straight from base of plant to leaf base with little bending or    arching, stiff; to 6.5 cm long and 1.4 cm wide at base, average 5.2    cm long and 10.0 min wide at base;-   Petiole color: early season still expanding adaxial center color    nearest RHS 144B; early season adaxial margin between RHS 144A and    RHS 144B; early season abaxial center nearest RHS 144B; early season    abaxial margin nearest RHS 144A; mid-season and later summer adaxial    center nearest RHS 137A; mid-season and later adaxial margins    between RHS 145A and RHS 146D; mid-season and later abaxial center    nearest RHS N138C; mid-season and later abaxial margins nearest RHS    147C;-   Veins: parallel, raised on abaxial side, normally 8 pairs on either    side of midrib;-   Veins color: on adaxial margin of expanding and mature leaves    nearest RHS N144D, all other veins same color as the surrounding    tissue;-   Flower description: Inflorescence: average 14.0 cm tall, and    flowering in the terminal 7.0 cm to a width of about 4.2 cm wide;-   Buds one day prior to opening: globose with rounded apex and terete    base; about 1.2 cm in diameter with base narrowing at about    mid-length to about 3.0 mm diameter; about 2.4 cm long;-   Bud color: between RHS 85B and RHS 91B with stripes of nearest RHS    85D;-   Flowers: perfect; single; perianth shape funnelform; held nearly    horizontal to slightly drooping; corolla tube about 2.2 cm wide and    about 2.5 cm long, (distal flowers smaller), fused in basal about    1.8 cm with basal about 1.2 cm forming a tube about 3.5 mm diameter;    persists for a normal period, usually one day on plant or as cut    flower; scapes remain effective with flowers from late June to    mid-July with 14 to 18 flowers per scape; no detectable fragrance;-   Tepal: two sets of three, glabrous, entire; fused at base; clavate    with broadly acute apex; each approximately 2.5 cm long and 1.1 cm    wide;-   Tepal color: inner set with thin transparent margin about 1.0 mm    wide; both tepal sets with adaxial base of white, lighter than RHS    155D, adaxial longitudinal middle nearest 76A with veins of between    RHS 77A and RHS 77B and distal one-third between RHS 76A and RHS    76B; abaxial basal tube of both tepal sets nearest RHS 76D with    lighter than RHS N77D at point of attachment; abaxial inner tepal    set longitudinal middle and distally nearest 76B with abaxial outer    tepal set longitudinal middle and distally nearest RHS 76C with    about nine veins of nearest RHS 76B; abaxial corolla tube nearest    very pale purple;-   Gynoecium: single;    -   -   Style.—single, approximately 2.6 cm long, 1.5 mm diameter,            curved upward slightly in distal 1.0 cm; color distally            lighter than RHS 155D, base nearest RHS 146B.        -   Stigma.—globose, about 2 mm in diameter, nearest RHS 145C.-   Androecium:    -   -   Filaments.—six, approximately 2.2 cm long and 1.0 mm in            diameter; curved upward to nearly 90 degrees in the apical            1.0 cm; color distal one-half white, lighter than RHS 155D,            basal one-half between RHS 145A and RHS 145B.        -   Anthers.—elliptic; dorsifixed, dehiscent longitudinally;            about 3.0 mm long, 2.0 mm wide; color nearest RHS 200D with            undertone of nearest RHS 22D prior to dehiscing and after            dehiscing between RHS N92A and. RHS 202A.        -   Pollen.—elliptic, abundant; less than 0.1 mm long, color            nearest to RHS 17A.-   Peduncle: usually one per mature division; glaucous, glabrous;    stiff; nearly vertical; 12 to 1.6 cm long, flowering in distal 7.0    cm; 5 mm in diameter at base;-   Peduncle color: nearest RHS 137B;-   Pedicel: short, glabrous; approximately 5.0 mm long, 2.0 mm    diameter; nearest RHS 146D with tinting of nearest RHS N77D) where    exposed to more light;-   Scape bracts: each flower normally subtended by a single bract,    decreasing in size distally with one or two below first flowers;    bracts subtending flowers protruding to nearly perpendicular to    scape; concavo-convex supporting flower bud; first bract subtending    flower about 12.0 mm long and 8.0 mm wide;-   Scape bract color: adaxial nearest RHS 146B distally, nearest RHS    146D base and margin between RHS 148D and RHS 145B; abaxial margin    blend between RHS 148D and RHS 145D and center nearest RHS 137B;-   Fruit: not yet observed;-   Seed: not yet observed; infrequent or sterile under present growing    conditions; believed to be sterile or recalcitrant;-   Disease resistance: The new plant has not shown any resistance to    pests and diseases common to Hostas. The plant grows best and shows    best coloration with plenty of moisture, adequate drainage and light    shade, but is able to tolerate some drought when mature, and    tolerates direct sun without leaf burn, especially during the cooler    parts of the day and when provided sufficient water. Hardiness at    least from USDA zone 3 through 9, and other disease resistance is    typical of that of other Hostas.

It is claimed:
 1. A new and distinct ornamental plant cultivar namedHosta ‘School Mouse’ as herein described and illustrated.